<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <style>
    * {
      margin: 0;
      padding: 0;

    }


    body {
      
      font-size: 13px;
      color: #676a6c;
      overflow-x: hidden;
    }

    a {
      text-decoration: none;

    }

    .container {
      height: 100%;
      width: 100%;
      overflow-x: hidden;
      background-color: #fff;
    }
    .top{
     float: right;
     margin-top: 50px;
     margin-right: 520px;
     color: skyblue;
     font-size: 35px;
     

    }
   

    .left {
      position: fixed;
      width: 220px;
      z-index: 2001;
      height: 100%;
      background: #2f4050;
    }

    .nav {
      padding-left: 0;
      margin-top: 0;
      margin-bottom: 0;
      list-style: none;
    }
    .nav-header{
      padding: 33px 25px;
      text-align: center;
      color: #DFE4ED;
      
    }
    .nav-header a{
      cursor: pointer;
      font-weight: 600;
    }
    li{
     margin: 20px;
     
     
      
      
    }

    .nav li a {
      
      color: #F5F5F5;
      list-style: none;
    }

    .main{
      width: 100%;
      position: fixed;
      z-index: 201;
      left: 220px;
      top: 120px;
      background-color: rgb(148, 167, 157);
    }

  </style>
</head>

<body>

  <div class="container">
    <div class="top">欢迎进入后台管理</div>
    <div class="left">
      <ul class="nav">
        <li class="nav-header"> <a>管理员</a></li>
        <li>
          <a href="/admin/welcome" target="main">主页</a>
        </li>
        <li>
          <a href="/admin/users" target="main">用户管理</a>
        </li>
        <li>
          <a href="/admin/logout" target="_top">退出系统</a>
        </li>
      </ul>
    </div>
    <div class='main'>
      <iframe src="/admin/welcome" name="main" frameborder="0" width="100%" height="600"></iframe>
    </div>

  </div>



























</body>

</html>